package com.zb.web;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.Method;

/**
 * @author zb
 * @create 2021-03-04 15:45
 */
public abstract class BaseServlet extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //解决post请求中文乱码问题
        resp.setContentType("text/html; charset=UTF-8");
        //解决响应的中文乱码
        req.setCharacterEncoding("UTF-8");
        String action = req.getParameter("action");
        try {
            //获取action业务鉴别字符串，获取相应的业务（方法反射对象）
            Method method = this.getClass().getDeclaredMethod(action,HttpServletRequest.class,HttpServletResponse.class);
            //调用目标业务
            method.invoke(this,req,resp);
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e);//把异常抛给Filter过滤器
        }
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req,resp);
    }
}